diff options
| author |   Mike Leach <mike.leach@linaro.org> | 2020-03-20 10:52:59 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-21 11:32:20 +0100 |
| commit | 177af8285b59a3887e4430d2c782598083cddcd7 (patch) | |
| tree | d77da94760b8f9d25f30bf6788a03201e17ad238 /drivers/hwtracing/coresight/coresight-priv.h | |
| parent | coresight: cti: Add device tree support for custom CTI (diff) | |
| download | linux-dev-177af8285b59a3887e4430d2c782598083cddcd7.tar.xz linux-dev-177af8285b59a3887e4430d2c782598083cddcd7.zip | |
coresight: cti: Enable CTI associated with devices
The CoreSight subsystem enables a path of devices from source to sink.
Any CTI devices associated with the path devices must be enabled at the
same time.
This patch adds an associated coresight_device element to the main
coresight device structure, and uses this to create associations between
the CTI and other devices based on the device tree data. The associated
device element is used to enable CTI in conjunction with the path elements.
CTI devices are reference counted so where a single CTI is associated with
multiple elements on the path, it will be enabled on the first associated
device enable, and disabled with the last associated device disable.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200320165303.13681-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-priv.h')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-priv.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 357ffef7b825..890f9a5c97c6 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -162,6 +162,16 @@ static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; } static inline int etm_writel_cp14(u32 off, u32 val) { return 0; } #endif +#ifdef CONFIG_CORESIGHT_CTI +extern void cti_add_assoc_to_csdev(struct coresight_device *csdev); +extern void cti_remove_assoc_from_csdev(struct coresight_device *csdev); + +#else +static inline void cti_add_assoc_to_csdev(struct coresight_device *csdev) {} +static inline void +cti_remove_assoc_from_csdev(struct coresight_device *csdev) {} +#endif + /* * Macros and inline functions to handle CoreSight UCI data and driver * private data in AMBA ID table entries, and extract data values. @@ -204,5 +214,7 @@ static inline void *coresight_get_uci_data(const struct amba_id *id) void coresight_release_platform_data(struct coresight_platform_data *pdata); struct coresight_device * coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode); +void coresight_set_assoc_ectdev_mutex(struct coresight_device *csdev, + struct coresight_device *ect_csdev); #endif |